Just to check are you in Modem mode? If not can you go to modem mode and the light should go "Magenta" and be a different colour - does it do that. Then go back to router mode and see whether it comes back red.
If it does stay red (not Magenta) report back.
-------------------- John --------------------
My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
I changed to MODEM MODE - no change in colour - still fiery red.
I changed back to ROUTER MODE - no change in colour (other than the green wifi light came on and has now gone off again).
The wifi works fine most of the time - but it just goes down a lot in the middle of important stuff. Shows broken signal sign regularly. And that button has not been white or any other colour than RED for a long time.
Thanks for posting and sorry to hear there's an issue with the hub,
I've been able to locate your account using your forum details, regarding the performance issues there is an area congestion issue that you're currently affected by, estimated fix date for this is 25th November.
After going through diagnostics it does advise that I need to arrange an engineer visit, I have noted about the red light on the modem also- you can view the time and date of your appointment via your online account here